Question 1
Question
What is the ability to dissolve in water and to conduct electricity ?
Answer
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physical properties
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chemical properties
Question 2
Question
Water is an example of ...
Answer
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an element
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a homogeneous mixture
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a compound
Question 3
Question
When matter changes the most common form of energy released or absorbed is ELECTRICAL ENERGY
Question 4
Question
New substances are always formed when matter undergoes a
Answer
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Chemical Change
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Physical Change
Question 5
Question
Chemical energy is the energy
Question 6
Question 7
Question
What is a chemical property?
Question 8
Question
What is an element?
Answer
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pure substances that cannot be broken down into other substances
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pure substances that are able to break down into other substances
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substances that turn into compounds when combined
Question 9
Question
What does the law of conservation of matter state.
Answer
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matter cannot be created or destroyed
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matter cannot be created but it can be destroyed
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matter can be created but it can't be truly destroyed
Question 10
Question
What is an endothermic reaction?
Question 11
Question
What are the three ways that compounds and mixtures differ?
Answer
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When elements are combined they form compounds having properties different from the uncombined elements each substance in a mixture has individual properties. Also, the parts of a mixture are not combined in a set ratio.
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When elements are combined they form compounds having properties different from the uncombined elements each substance in a mixture has individual properties. Also, the parts of a mixture are combined in a set ratio.
Question 12
Question
How does a physical change differ from a chemical change?
A physical change change in shape but is the same substance after the change. However the chemical change turns into a new substance.
Question 13
Question
How are changes in matter related to changes in energy?
Changes in matter are related to changes in energy because the substances change.
Question 14
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How do you know that the burning of candle wax is an exothermic change?
The burning of candle wax is an exothermic change because it produces carbon dioxide,water, and heat.
Question 15
Question
If two mixtures are mixed and the temp rises, did it absorb or release thermal energy?
It realeased thermal energy because the heat was let out and made the temperature rise.
Question 16
Question
What is the ratio of phosphorus atoms to oxygen atoms in the compound?
The ratio is two to four